Breast pump



FIG. 1 is a perspective view of a breast pump.

FIG. 2 is a top view of the breast pump shown in FIG. 1.

FIG. 3 is a bottom view of the breast pump shown in FIG. 1.

FIG. 4 is a front view of the breast pump shown in FIG. 1; and,

FIG. 5 is a rear view of the breast pump shown in FIG. 1. 

The ornamental design for a breast pump, as shown and described. 